#include <bits/stdc++.h>
using namespace std;
const int N = 300300;
int dp[N];
int main(void){
    int n;
    cin >> n;
    for(int i = 1; i < N; i++) dp[i] = 0;
    
    int a, ma, ans = 0;
    for(int i = 0; i < n; i++){
        cin >> a;
        if(a == 1) ma = 1;
        else if(dp[1] + 1 > dp[a]) ma = dp[1] + 1;
        else ma = dp[a];
        
        for(int i = 2; i * i <= a; i++){
            if(a % i == 0){
                if(dp[i] + 1 > ma) ma = dp[i + 1];
                if(dp[a / i] + 1 > ma) ma = dp[a / i] + 1;
            }
        }
        dp[a] = ma;
        if(ma > ans) ans = ma;
    }
    cout << ans << "\n";
    
}